Photographic apparatus.



A. A. BROOKS. PHOTOGRAPHIO APPARATUS.

APPLICATION FILED KAY 19,1909. v 967,492. I Patented Aug, 16, 1910.

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PHOTOGRAPHIG APPARATUS.

Specification of Letters Patent.

Patented Aug. 16, 1910.

Application filed May 19, 1909. Serial No. 497,103.

To all whom it may concern:

Be it known that I, ARTHUR AUGUSTUS BROOKS, a subject of the King ofGreat Britain, residing at Ashton-on-Mersey, in

the county of Chester, England, have invented new and usefulImprovements in Photographic Apparatus, of which the following is aspecification.

This invention relates to an improved system of packing and changingsensitized plates and to improved means therefor, by which improvements,sensitized plates can be transferred in daylight to the camera from theimproved packet or wrapper in which they are sold to the user, and afterexposure in the camera can be rescaled in the packet and the latterremoved from the camera without admitting daylight, the object of theinvention being to facilitate the taking of photographs and dispensewith changing bags and separate dark rooms.

The improved system can be carried out by the following means andapparatus consisting(l) of a two part sheath holding two sensitizedplates, and (2) a double dark slide or plate holder of specialconstruction.

The improved sheath is made in two parts and preferably of thin metaland each part thereof is made as a shallow tray one part being slightlysmaller than the other so as to fit inside it. The sensitized plates areeach fixed to one part of the sheath, and the two parts fit together ina light tight manner. The sensitized surfaces of the plates come face toface and preferably touch one another when the sheath is closed.

The plate holder is equivalent to a double dark slide and is made in twoparts which have means for securing them together while the plates inthe sheath are being separated. One part of the plate holder is made toreceive the sheath and the other part to receive one half of the sheathwhen the parts of the latter are separated. Each part of the plateholder is provided with a shutter so that the plate therein can becovered while the other is being exposed in the camera. By securing thetwo parts of the plate holder together and withdrawing the shutters thetwo parts of the sheath can be closed together again and afterwardremoved from the holder through an opening therein.

The drawings attached hereunto illustrate the improved means andapparatus by which my improved system of packing sensitized plates, andchanging them in daylight without the use of a dark room or chamber canbe carried out.

In the drawings Figure 1 represents a front elevation of my improvedsheath containing two sensitized plates; Fig. 2 a side elevation of thesheath the two parts thereof being separated; Fig. 3, an enlarged crosssection of the two parts of the sheath closed together; Fig. l a frontelevation of my improved plate holder or dark slide; Fig. 5 a sideelevation of the same; Fig. 6 a side elevation in section the two partsbeing separated; Fig. 7 a similar view in cross section; and Fig. 8 aplan of the plate holder looking from above.

Referring first to Figs. 1 to 3. The improved sheath consists of twoparts 2 and 3, each being made with preferably closed backs and havingshallow sides or flanges 4 the sides of the part 3 being made to fitinto the sides of part 2. Nhen the two parts are fitted together thereis sufficient room for two sensitized plates inside. The plates arerepresented by 5 and the sensitized films or faces thereof by 6, seeFig. 3. The parts 2 and 3 of the sheath are so fitted together that thejoint between them excludes the light. In Fig. 3 which shows the sheathand plates on an exaggerated scale for clearness, a channel is left allaround the plate 5 in its part 2 of the sheath, and a softpacking orluting 7 is inserted in the channel. The sides 4 of the part 3 areextended so as to enter this channel and come in contact with thepacking. The latter may be of felt, or other fibrous material or of somesuitable viscous substance. The plates are shown with their sensitizedfaces 6 in actual contact. Each plate is covered around its edges andalso on its back, with a nonactinic covering represented by 8 and thiscovering may be of suitable black paper or of a suitable paint. Theplates are secured at their backs to their respective parts of thesheath preferably with a soluble cement. For gripping the parts 2 and 3of the sheath in order to facilitate separating them in the plateholder, I form the part 2 with splayed or turned over sides or flangesso as to obtain prominent edges such as 11, and I provide of thin wireor of string. The ring is shown secured by a loop such as 13 which issomewhat exaggerated in Fig. 2, the loop being also useful for holdingthe part 3 when separated from the part 2 as herein after stated.

Referring now to Figs. 4: to S which represent a form of plate holder ordark slide adapted to receive and to facilitate the separation andexposure of plates packed to gether as hereinbefore described. Thisplate holder is adapted for use in an ordinary camera suitable for theparticular size of plates. The plate holder illustrated is made in twoparts 15 and 16. Each part comprises a back 17 having an aperture 18therein which aperture is preferably just sufiiciently large to enable acouple of the fingers to be inserted, a light frame 19 and a shutter 20.A tongue 21 and a groove 22 are shown in the faces of the holder whichcome together one at the top and the other at the bottom so that theframes shall correctly register, and on the side margins are shownvelvet strips such as 23 for excluding the light. hen the parts 15.and16 are closed together, means are provided for securing them so, and mayconsist of two light spring clips 24:, Figs. 4, 5 and 8. Figs. 6 and 7represent the holder in section the two parts thereof being separated.In the part 15 of the holder, the sides are rabbeted internally as shownexcept at the top and bottom forming a wide groove 28 at each side forthe purpose of receiving the prominent edges 11 of the part 2 of thesheath and a door such as 29 Fig. 8 is shown for inserting the sheathinto the grooves 28. The door is made a light tight fit, and is shownhinged at 30 and with a catch at 31.

The sheath can be easily removed through the doorway by withdrawing theshutter of the part 15 and inserting the fingers through the frame andthe aperture 18 after the door has been opened. The sheath is insertedthrough said doorway with its outer part 2 into the part 15 of theholder. The part 15 being pressed close to the part 16 the two may befixed together by means of the clips 24. Both shutters 20', beingwithdrawn, the fingers may be inserted through the aperture in the part16 and the inner part 3 of the sheath drawn away from the outer part 2by means of the ring 12. In order to insure that the part 3 of thesheath shall remain firmly in'the part 16 of the slide, a hinged fingeris shown by 32 which is adapted to enter the loop 13 in the part 3 ofthe sheath. After the plates have been separated, the shutters 20 arepushed in, and the two parts of the holder can then be separated andeach one can be independently inserted into a camera and used in thesame manner as an ordinary plate holder or dark slide. After the twoplates have been exposed in the camera, the two parts of the plateholder can be brought and secured to gether again as hereinbeforedescribed, the shutters 20 withdrawn, and the part 3 of the sheathpressed into the part 2 through the aperture 18 in the part 16 of theholder. By separating the parts of the holder, the shutter of the part15 being drawn out, the sheath with exposed plates can be withdrawn fromthe part 15 through the door 29.

Vhat I claim as my invention and desire to secure by Letters Patent ofthe United States is 1. A sheath for sensitized photographic platescomprising in combination, two shallow trays each formed to receive aplate with the sensitized side facing outwardly, said trays havingmarginal light excluding portions and being proportioned to engage thesensitized faces of the plates with each other when the trays are inclosed relation, and means for maintaining said trays in closed relationwith respect to each other to inclose said plates.

2. A sheath for sensitized photographic plates comprising incombination, two shallow trays each formed to receive a plate with thesensitized side facing outwardly, said trays having marginal portionsarranged and constructed to overlap and together form an inclosingsheath for the plates when the said trays are in closed relation withrespect to each other.

3. A sheath for sensitized photographic plates comprising incombination, two shallow trays each formed to receive a plate with thesensitized side facing outwardly, each tray having marginal flangesarranged and constructed to overlap and together form an inclosingsheath when in closed relation, said trays being proportioned withrespect to the thickness of the plates so'as to bring the sensitizedsides thereof in contact when the trays are in closed relation, theouter overlapping flange of one tray projecting outwardly to form anengaging portion, for the purpose set forth.

4:. A sheath for sensitized photographic plates comprising incombination, two shallow trays each formed to receive a plate with thesensitized side facing outwardly, said trays having marginal flangesarranged to overlap, the inner overlapping flange having a depth equalto the thickness of a plate, and packing interposed between the outeroverlapping flange and the plate in the tray thereof, said packing beingof sufficient thickness to be engaged by the inner flange when the traysare brought together to inclose said plates.

5. A camera slide comprising in combination, two slide frames eachprovided with a cavity for a sensitized photographic plate, a shutterfor each slide, the shutter margins of said frames having light tightportions and both of said frames having plate sheath retaining means,and means for holding said frames together.

6. A camera slide comprising in combination, tWo slide frames eachprovided with a cavity for receiving a sensitized plate, a shutter foreach frame, the backs of said frame having openings to permitmanipulation of the plates, the front or shutter sides of said frameshaving interfitting light tight portions and both of said frames havingplate sheath retaining means, and means for holding said frames in lighttight face to face relation.

7. A gamera slide comprising in combination, tWo slide frames eachprovided With a receiving cavity for a sensitized photographic plate, ashutter for each frame, a sheath or covering for each plate, one of saidsheaths havin an attaching portion projecting rearward ly therefrom andthe respective frame of such sheath having a rear opening permittingsuch portion to extend therethrough, each frame having an element forconnection With such portion to retain the plate in place in said frame,the other of said slides having means engaging the sheath of its platefor retaining the same therein, and means for holding said framestogether.

In testimony whereof I have signed my name to this specification in thepresence of tWo subscribing Witnesses.

ARTHUR AUGUSTUS BROOKS.

WVitnesses:

RIDLEY JAMES UR UHART, WILLIAM J ONES.

